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iPad Mail locking Exchange Account


iPF Noob
Jan 10, 2012
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Hi All,

Thanks for stopping by.

I work for a company that supports over 70 ipads, both ipad1 & ipad2. We have all staff members accessing the exchange mail server using the Mail client.
Recently on several occassions, the CEO could not receive his emails and has been prompted to enter his password. He is using an ipad2 with iOS 5.01.

At first we thought he changed his password at the computer and forgot to update the ipad, but after the second and third time it happened, we realised there was something strange happening.

With further investigation we discovered 10 security log entries on the DC server with the following Event Properties all with the same time stamp to the second:

Date: 06/01/2012 Source: Security
time: 14:45:23 Category: Account Logon
Type: Failed Aud Event ID: 675
Computer: CRSDC05

Pre-authentication failed:
User Name: xyz
User ID: MyCompany\xyz
Service Name: kbtgt/MyCompany
Pre-Authentication Type: 0x2
Failure Code: 0x12
Client Address:

The ip address points to the OWA server (i.e CRSOWA03). On the OWA server the network admin was able to retrieve the following information showing that the ipad Mail app had caused the account to lock out.

2012-01-06 14:45:22 W3SVC100 CRSOWA03 OPTIONS /Microsoft-Server-ActiveSync - 443 MyCompany\xyz HTTP/1.1 Apple-iPad2C2/901.405 - - mail.mycompany.net 401 1 1909 298 302 0
The strange thing is that the CEO did not change his password and the password was not due to expire for another 2 weeks. He was able to access his emails from his ipad that morning.

Does anyone know if this is an ios 5.01 issue. We've already tried replacing the ipad and it doesn't look like a hardware issue.

Thanks for your help.

Hi and welcome to the Forum!

I cannot help you with this but I've moved your thread to our Help Section where you will receive a better response.

The IPad Forum is a community of members from all walks of life and from all over the world coming together to share our experiences and to help each other learn about this wonderful piece of technology the Ipad. There is a wealth of information already here in the many threads we have so doing some searches will answer most of the questions you have. If then you cannot find the answer you are seeking then by all means post your question. There are many friendly and informed members here only too willing to help you.

We also have our own App - It is a very simple app to navigate.
Reading the IPad manual is a great place to start so please download a copy of these.
2 very informative threads from which you will learn many tips and shortcuts for the IPad.
We have rules like any Community so please read these also

Once again we welcome you here and are so pleased you have joined us!

Sent from my iPad using iPF

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